Two-Dimensional Multiple-Snapshot Grid-Free Compressive Beamforming Using Alternating Direction Method of Multipliers

Figure 6

Loudspeaker source maps at (a), (b) 2000 Hz, (c), (d) 3000 Hz and (e), (f) 4000 Hz obtained by the two-dimensional multiple-snapshot grid-free compressive beamforming using (a), (c), (e) the IPM based SDPT3 solver and (b), (d), (f) our ADMM based algorithm. The non-uniform array with 30 microphones is employed.

(a)

(b)

(c)

(d)

(e)

(f)